Week 5- Depth Perception

Question 1

What is pictorial?

Answer 1

Relating to a picture

Question 2

What does visual mean?

Answer 2

That the info comes purely from the retinal image

Question 3

What is oculomotor

Answer 3

Info comes from eye muscle signals

Question 4

What is ordinal vs metric?

Answer 4

Ordinal- order, metric is number

Question 5

When eyes are lateral, what happens

Answer 5

Eyes are on each side of the head. Visual fields overlap only minimally.

Question 6

What animals have frontal eyes?

Answer 6

Predators. Visual fields overlap considerably

Question 7

What are the pros of frontal eyes?

Answer 7

Binocular Summation
Two chances to see the object
 Lower thresholds (detection/discrimination)
Depth Perception
Two separate viewpoints
Allows us to extract depth information

Question 8

What are the cons of frontal eyes?

Answer 8

Reduces total visual field

Question 9

What is vergence?

Answer 9

the simultaneous movement of the pupils of the eyes towards or away from one another during focusing.

Question 10

Where do fixated objects fall?

Answer 10

Into our fovea

Question 11

How is vergence used?

Answer 11

to calculate the depth of a fixated object through the angular position of each eye

Question 12

For long distances, what will the vergence be?

Answer 12

Vergence angle will be small

Question 13

For long distances, what will the vergence be?

Answer 13

large

Question 14

What is stereopsis?

Answer 14

Binocular visual cues to depth

Question 15

Who is the father of stereostopic vision?

Answer 15

Wheatsone

He noticed the difference in the retinal position of objects in the two eyes signal depth

Question 16

What is another word for binocular disparity?

Answer 16

Retinal disparity or binocullar parallex, stereopsis

Question 17

What is binocular disparity

Answer 17

For any two objects at different depths, the relative position of their images is different in the two eyes

Question 18

Describe binocular disparity by using visual cues

Answer 18

Binocular, Non-pictorial, Visual, Metric

Question 19

What is the horopter?

Answer 19

A line of all possible locations where an objects half-images fall on corresponding points.
Defines locations at which objects have zero disparity

Question 20

If anything is nearer than the horopter, what do they have?

Answer 20

crossed disparity

Question 21

If anything is further than the horopter, what do they have?

Answer 21

Uncrossed disparity

Question 22

What is Panum’s fusional area?

Answer 22

Zone around the horopter where single vision occurs. It combines locations of the two objects and has good metric depth.

Question 23

Outside of Panum’s fusional area, what happens?

Answer 23

Diplopia, when you see two unfused images